Clinical Trials Study
Copyright ©The Author(s) 2023. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Feb 26, 2023; 11(6): 1299-1309
Published online Feb 26, 2023. doi: 10.12998/wjcc.v11.i6.1299
Efficacy of invisible advancement correction for mandibular retraction in adolescents based on Pancherz analysis
Lei Kong, Xin-Qiang Liu
Lei Kong, Xin-Qiang Liu, Department of Stomatology and Orthodontics, The Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
Lei Kong, Xin-Qiang Liu, Department of Stomatology, Qingdao University, Qingdao 266003, Shandong Province, China
Author contributions: Kong L contributed to the conceptualization, methodology, data curation, writing original draft, visualization, investigation of the manuscript; Liu XQ contributed to the clinical treatment, supervision, writing-reviewing of the manuscript.
Institutional review board statement: This study was reviewed and approved by the Medical Ethics Committee of The Affiliated Hospital of Qingdao University (authorisation number: QYFYWZLL26729).
Clinical trial registration statement: The clinical study website registration has been completed prior to the start of the project.
Informed consent statement: All patients gave written informed consent before participation in this study.
Conflict-of-interest statement: All the authors report no relevant conflicts of interest for this article.
Data sharing statement: Publications conditional upon the agreement of the authors to make freely available any materials and information described in their publication that may be reasonably requested by others.
CONSORT 2010 statement: The authors have read the CONSORT 2010 Statement, and the manuscript was prepared and revised according to the CONSORT 2010 Statement.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Xin-Qiang Liu, MD, Chief Physician, Professor, Department of Stomatology and Orthodontics, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao 266003, Shandong Province, China. dentistlxq@163.com
Received: October 21, 2022
Peer-review started: October 21, 2022
First decision: December 13, 2022
Revised: January 3, 2023
Accepted: February 8, 2023
Article in press: February 8, 2023
Published online: February 26, 2023
ARTICLE HIGHLIGHTS
Research background

In recent years, invisalign treatment with mandibular advancement (MA) has emerged for correcting class II malocclusion in growing teens with patients reporting comfort and satisfaction during the treatment; this approach uses precision wings incorporated into the upper and lower aligners to engage the mandible in an advanced edge-to-edge position while the anterior teeth are being aligned. It was developed to combine the concept of growth regulation with tooth movement to support simultaneous dental arch expansion, tooth alignment and MA. Whether the simultaneous correction of the bite along with dental alignment results in greater efficiency compared to treating the bite relationship and the dental alignment sequentially, there is lack of sufficient clinical research support.

Research motivation

This study aimed to investigate the clinical effect of invisalign MA in the treatment of mandibular retraction in adolescents. Pancherz analysis was used to separate the skeletal and dental effects.

Research objectives

To analyse the dentoskeletal effects of the invisalign MA device in the treatment of skeletal class II malocclusions.

Research methods

Lateral cranial radiographs before and after treatment of 30 subjects were collected, pre-treatment (T0) and post-treatment (T1) lateral cephalograms were mainly traced using Pancherz’s cephalometric analysis, the differences were assessed with paired samples t-test at the P < 0.05 level.

Research results

Improvement in class II relationship resulted from skeletal and dental changes. The position of the mandible moved forward 3.13 mm. There was 4.31 mm overjet reduction of which 58.7% due to skeletal factors, and 3.87 mm molar correction of which skeletal factors were accounted for 65.4%.

Research conclusions

The research show the effectiveness of MA in the management of skeletal class II malocclusions due to mandibular retrusion, highlighting an improvement in the sagittal relationships between the upper and lower bases.

Research perspectives

Further prospective studies should be conducted with a control group and larger sample size.